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Related Experiment Video

Updated: Jul 11, 2026

Drosophila Adult Olfactory Shock Learning
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Drosophila Adult Olfactory Shock Learning

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Multiple memory traces for olfactory reward learning in Drosophila.

Andreas S Thum1, Arnim Jenett, Kei Ito

  • 1Lehrstuhl für Genetik und Neurobiologie, Biozentrum, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|October 12, 2007
PubMed
Summary

Appetitive learning in fruit flies creates memory traces in multiple brain cell types, utilizing the Rutabaga protein. Aversive learning, however, shows memory traces localized to specific cells, reflecting reward and punishment processing.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Animal Behavior

Background:

  • Memory traces in Drosophila melanogaster are primarily housed in Kenyon cells of the mushroom bodies.
  • The adenylate cyclase protein, Rutabaga, is crucial for mediating both appetitive and aversive odor memories.
  • Previous research indicates Rutabaga's role in memory formation.

Purpose of the Study:

  • To investigate the cellular localization of memory traces for appetitive and aversive learning in Drosophila.
  • To determine if appetitive learning involves multiple memory trace locations dependent on Rutabaga.
  • To compare the organization of memory traces between appetitive and aversive learning.

Main Methods:

  • Utilizing localized expression of the rutabaga gene in specific neuronal populations (projection neurons and Kenyon cells).

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Last Updated: Jul 11, 2026

Drosophila Adult Olfactory Shock Learning
09:48

Drosophila Adult Olfactory Shock Learning

Published on: August 7, 2014

Appetitive Associative Olfactory Learning in Drosophila Larvae
09:22

Appetitive Associative Olfactory Learning in Drosophila Larvae

Published on: February 18, 2013

Olfactory Behaviors Assayed by Computer Tracking Of Drosophila in a Four-quadrant Olfactometer
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Olfactory Behaviors Assayed by Computer Tracking Of Drosophila in a Four-quadrant Olfactometer

Published on: August 20, 2016

  • Assessing the rescue of mutant defects in appetitive short-term memory through targeted gene expression.
  • Comparing the rescue of aversive odor memory defects in projection neurons versus Kenyon cells.

    • Main Results:

    • Localized expression of rutabaga in projection neurons or Kenyon cells rescued appetitive short-term memory defects.
    • Appetitive learning appears to induce Rutabaga-dependent memory traces in both first- and second-order olfactory interneurons.
    • Aversive odor memory was selectively rescued in Kenyon cells, but not in projection neurons.

    Conclusions:

    • Appetitive learning in Drosophila may involve parallel memory traces in different olfactory processing centers.
    • The differential localization of memory traces for appetitive versus aversive learning suggests distinct neural substrates for reward and punishment.
    • The Rutabaga protein mediates memory traces through a conserved plasticity mechanism across different neuronal populations.